Accountants do it, joiners do it, professors and company heads as well – they make mistakes. After all, to err is a human trait. And because nature does not grant exceptions even in the construction sector, we are putting all our efforts into developing the Verification Buddy app. The objective is to give construction workers the opportunity to check formwork assemblies by way of image analysis on their own smartphones. Correct use of ties, supports etc. is marked in green, while errors are displayed in red and with an alert. Documentation of correct execution is becoming increasingly important. The app makes a valuable contribution in this respect as well. Each quality check is documented gapless and in this way can be used in potential liability discussions.